Two structures of primary holes (staggered jets and aligned jets) were designed for reverse-flow liner. Experiments were conducted to study the combustor ignition performance affected by two structures of primary holes at different pressure conditions. The experiment result indicates that as the inlet air pressure of the reverse-flow combustor decreases

the fuel/air ratio at ignition boundary decreases at first and then increases. The ignition performance of aligned jets primary holes is better than that of staggered jets primary holes. Combined with numerical simulation results of liner cold flow field and ignition phenomena observed in the experiment

the area of recirculation zone is expanded and reference velocity of the liner is reduced due to the aligned jets primary holes. It is beneficial for decreasing the quenching probability of flame kernel and enhancing the stability of the flame. Thus ignition performance of the reverse-flow combustor is improved.